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tuankhongbietcode/README.md

Võ Lê Anh Tuấn · vlat273

Cybersecurity student at Swinburne University of Technology, currently interning in IT operations. I came up through network operations and SIEM before moving toward offensive security — which means I read an attack path from both sides.

Working through the HTB Certified Penetration Testing Specialist (CPTS) track, and building case files from authorised lab and internship work.

Portfolio → — case files, lab builds and home lab operations.


Things I have actually done

  • Authorised web application assessment — during my network internship I proposed and received approval to assess an internal web application, then reproduced, root-caused and remediated three vulnerabilities in a production PHP CMS: SQL injection leading to admin authentication bypass, HTTP verb tampering leading to privilege escalation, and a reflected XSS issue I found myself. I fixed the code, deployed to production and re-tested to verify.

  • Distributed Splunk Enterprise lab — onboarded five log families (Windows Event, Sysmon, Linux syslog, web application, firewall), validated ingestion and field extraction, normalised time, and shipped dashboards, alerts and POC documentation.

  • Network operations — multi-VLAN production segments and the training lab behind them: Cisco routing and switching, firewalls, VPN, VMware ESXi and EVE-NG, plus the runbooks and backups that keep it recoverable.

  • Event Payment Registration — event ticketing with payOS payment integration, HMAC-SHA256 verified webhooks, QR check-in with duplicate-entry prevention, Supabase storage and Excel reconciliation export. Hardened with an admin token gate, CORS allowlist, rate limiting, helmet, CI and API smoke tests.


How I work

Method first, evidence always, no inflated claims. Nothing goes public that I cannot reproduce from an authorised environment — and nothing that has not been sanitised first. A case file with a credential or a flag in it is worth less than no case file at all.

Interests — web application security · Active Directory · detection engineering · network security

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